OS command injection in Grandstream UCM6200 Series
Priority MEDIUM 48CWE-78Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-78.
Summary
Grandstream UCM6200 series firmware version 1.0.20.23 and below is vulnerable to OS command injection via SSH. An authenticated remote attacker can execute commands as the root user by issuing a specially crafted "unset" command.
Why it matters now
EPSS 0.03204 88th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Grandstream UCM6200 Series | up to 1.0.20.23 | — | No fix listed | CNA |
- Grandstream UCM6200 Series Vendor— Affected up to 1.0.20.23 Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:grandstream:ucm6202_firmware:*:*:*:*:*:*:*:* | up to 1.0.20.23 | Vulnerable | Grandstream |
| cpe:2.3:h:grandstream:ucm6202:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Grandstream |
| cpe:2.3:o:grandstream:ucm6204_firmware:*:*:*:*:*:*:*:* | up to 1.0.20.23 | Vulnerable | Grandstream |
| cpe:2.3:h:grandstream:ucm6204:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Grandstream |
| cpe:2.3:o:grandstream:ucm6208_firmware:*:*:*:*:*:*:*:* | up to 1.0.20.23 | Vulnerable | Grandstream |
| cpe:2.3:h:grandstream:ucm6208:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Grandstream |
- cpe:2.3:o:grandstream:ucm6202_firmware:*:*:*:*:*:*:*:* Versions up to 1.0.20.23 Vulnerable ·Grandstream
- cpe:2.3:h:grandstream:ucm6202:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Grandstream
- cpe:2.3:o:grandstream:ucm6204_firmware:*:*:*:*:*:*:*:* Versions up to 1.0.20.23 Vulnerable ·Grandstream
- cpe:2.3:h:grandstream:ucm6204:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Grandstream
- cpe:2.3:o:grandstream:ucm6208_firmware:*:*:*:*:*:*:*:* Versions up to 1.0.20.23 Vulnerable ·Grandstream
- cpe:2.3:h:grandstream:ucm6208:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Grandstream
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-5759
- 2026-10-03 Alias added: GHSA-559m-xqw9-mvgm
References
More Grandstream Ucm6202 Firmware vulnerabilities
- TI-2020-04685 OS command injection in Grandstream UCM6200 Series CVSS 3.1CRITICAL 9.8
- TI-2020-04651 Cleartext storage of sensitive information in Grandstream UCM6200 series CVSS 3.1CRITICAL 9.8
- TI-2020-04652 SQL injection in Grandstream UCM6200 series CVSS 3.1HIGH 7.5
- TI-2020-04686 OS command injection in Grandstream UCM6200 Series CVSS 3.1HIGH 8.8
- TI-2020-04654 SQL injection in Grandstream UCM6200 series CVSS 3.1HIGH 7.5
- TI-2020-04653 SQL injection in Grandstream UCM6200 series CVSS 3.1MEDIUM 5.9
Sources
- CVE-2020-5759 · CVE Program
- CVE-2020-5759 · NVD
- FIRST EPSS
- GHSA-559m-xqw9-mvgm · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences